Diff: main.cpp

Revision:

3:42a3ae578926

Parent:

2:c8c30a78bbb3

--- a/main.cpp	Fri Oct 28 06:57:55 2016 +0000
+++ b/main.cpp	Sun Oct 30 07:19:46 2016 +0000
@@ -1,7 +1,8 @@
 /*
  * MCP23S17 Test
  *
- * https://developer.mbed.org/users/romilly/code/MCP23S17/
+ * MCP23S17 Library:
+ * https://developer.mbed.org/users/stjo2809/code/MCP23S17/
  *
  * mbed:  rev 121
  * mbed-rtos: rev 117
@@ -14,38 +15,51 @@
 #include "rtos.h"
 #include "MCP23S17.h"
 
-#define OPCODE (0x40)
-
 SPI Spi(PC_12, PC_11, PC_10); // SPI3: mosi, miso, sclk
 //SPI Spi(PA_7, PA_6, PA_5); // SPI1:  mosi, miso, sclk
 
-// MCP23S17(SPI& spi, PinName ncs, char writeOpcode);
-MCP23S17 Mcp23s17(Spi, PD_2, OPCODE);
+InterruptIn Mcp23s17Int(PA_14);
+
+// MCP23S17(int hardwareaddress, SPI& spi, PinName nCs, PinName nReset);
+MCP23S17 Mcp23s17(0x00, Spi, PD_2, PA_13);
+
+void dataChanged()
+{
+    char data = Mcp23s17.intcapb();
+    wait_us(1);
+    Mcp23s17.gpioa(data);
+}
 
 int main()
 {
     printf("\r\n\n*** MCP23S17 Test ***\r\n");
 
+    // Reset MCP23S17
+    Mcp23s17.reset();
+    
     // PORTA output
-    Mcp23s17.direction(PORT_A, 0x00);
+    Mcp23s17.iodira(0x00);
 
     // PORTB input
-    Mcp23s17.direction(PORT_B, 0xFF);
+    Mcp23s17.iodirb(0xFF);
     // PORTB pull-up
-    Mcp23s17.configurePullUps(PORT_B, 0xFF);
+    Mcp23s17.gppub(0xFF);
+    // PORTB invert polarity
+    Mcp23s17.ipolb(0xFF);
+    // PORTB enable on change interrupt
+    Mcp23s17.gpintenb(0xFF);
+    
+    // Attach the callback function
+    Mcp23s17Int.rise(&dataChanged);
     
     // LED Check
     for (int i = 0; i < 8; i++) {
-        Mcp23s17.write(PORT_A, (1 << i));
-        wait(0.2);
+        Mcp23s17.gpioa(1 << i);
+        wait(0.1);
     }
-    Mcp23s17.write(PORT_A, 0x00);
+    Mcp23s17.gpioa(0x00);
     
     while (true) {
-        char data = ~Mcp23s17.read(PORT_B);
-        Mcp23s17.write(PORT_A, data);
-        
-        //printf("%02x\r\n", data);
     }
 }